Definition: angle between the North direction and the calibrator boresight direction projected on the horizontal (East-North) plane (measured clock wise)

More precisely the angle between the plane defined by the (UP ⃗) and North (N ⃗) versors and the plane in which the North (N ⃗), boresight (P ⃗) (and also (∂P ⃗)/(∂θ )) versors lay

Range: from 0° to 360°.

Use: it defines the direction the sensor is pointing along the horizontal plane.

Example: an azimuth of 90° means the sensor is pointing east (assuming clockwise measurement from north).

Definition: angle between the horizontal plane (East-North)  and the boresight direction (measured counter clock wise).

More precisely the angle between the plane defined by the East and North versors and the one containing the pointing (boresight) version to (P ⃗) and orthogonal to (∂P ⃗)/(∂θ ).

Range: from 0° to 90°.

Use: it defines the direction the sensor is pointing along the vertical plane.

Definition: angle describing the rotation around the pointing direction. The rotation is measured counter clock wise from the (∂P ⃗)/(∂θ ) direction, being P ⃗ the pointing (boresight) direction.

Range: from 0° to 360°.

Purpose: ensure the correct alignment of the transmitted/received polarization with the target or calibration standard.